Know-nothingism has become fashionable on the religious right. Many right-wing fundamentalists insist that assertions contained in an ancient mish-mash of a book are every bit as valid as carefully arrived-at, repeatedly tested scientific theories and conclusions.

In a striking bit of irony, some go even further and (unconsciously) mimic academic postmodernists, insisting that all “opinions” (including scientific conclusions) are equal. Thus willful ignorance among the least educated mirrors willful ignorance among the most educated.

Given all this, it’s good to remind ourselves of why facts matter, and why science is superior to religious faith.

Failure to take facts into account has real-world consequences. To cite a trivial example, if you believe you’re invulnerable because you believe you are, test your hypothesis by stepping in front of a truck. To cite a sadder, all-too-real example, science has established that the similarities between human beings vastly outweigh the differences, and that there’s no basis for assertions that any race is superior to any other. So, are the opinions of racists just as valid as the scientific conclusion that the differences between racial groups are trivial?

To cite still another example of why facts matter, in the Middle Ages in Europe, with science at a standstill, many believed that disease and bad weather were caused by witchcraft. End result? Tens, perhaps hundreds, of thousands of “witches” were brutally murdered for “causing” storms and disease.

There are innumerable other examples demonstrating why facts matter. And, yes, you can’t absolutely prove anything, but probabilities are so high in so many cases that it’s reasonable to act as if the probablity is 100%.

So, facts do matter. But why does science trump religion?

1. The scientific method is the only reliable way to arrive at the most probably correct explanation of almost anything. Scientists reach conclusions by formulating hypotheses, checking those hypotheses against observed phenomena, devising experiments to test the hypotheses, checking them for internal consistency, and checking to see if the hypotheses can generate accurate predictions. Then doing all this over and over again, with different scientists repeatedly testing the hypotheses (“theories” if they consistently pass all these tests over a prolonged period of time) through experiment, observation, and analysis.

This is a bit different than pointing to a hoary book written by iron-age slaveholders and asserting, “This is a fact! It says so here!”

A good example of this is provided by scientific exploration of racial differences between humans. In the 19th century, some scientists asserted that whites were superior to other races. By the middle of the 20th century, other scientists had definitively debunked those assertions through observation, experiment, and analysis. (Yes, there are still a few racist scientists, but their assertions are knocked down almost as soon as they make them, and the vast majority of scientists now accept, in line with scientific research, that assertions of racial superiority or inferiority are baseless.)

The overt racism of the Book of Mormon slightly predates the racist assertions of some 19th-century scientists, with the Book of Mormon itself referring to caucasians as “white and exceedingly fair and delightsome” (2 Nephi 5:20-21); and as late as 1935, Mormon Prophet Joseph Fielding Smith asserted that “because of [Cain’s] wickedness he became the father of an inferior race.” (The Way to Perfection, p. 101)

Finally, in 1978, in response to widespread social condemnation (and undoubtedly a desire to increase the number of potential converts), then-prophet Spencer W. Kimball announced a new “revelation” that the church should abandon its racial restrictions on the priesthood (but not the “revealed” racist passage in 2 Nephi, nor the racist statements of previous “prophets”). That’s a bit different than the way science handled the matter, eh?

3. Science improves daily life. Religion doesn’t. One clear example of this is in the field of medicine. Scientists discovered the microbial nature of disease. That discovery led to use of antiseptics and the later development of antibiotics, which have saved the lives of untold millions.

In contrast, religion has led to no developments that improve daily life. (And please don’t start talking about the power of prayer and the peace it brings–we’re speaking here of demonstrable physical improvement.)

4. Science leads. Religion lags. A good example of this is our understanding of the universe beyond the Earth. Early scientists (Copernicus, Galileo, et al.) led the way to accurate description of the physical universe.

At the same time, the church was insisting that the sun revolves around the Earth, and hauling scientists who dared to state the opposite before the Inquisition.

Another example is the scientific versus religious attitude toward women. Science has established that while there are obvious and not-so-obvious differences between men and women, their intellectual abilities are almost identical (with a few end-of-the-bell-curve differences in a few specific areas).

In contrast, religion has insisted on the inferiority and consequent subordination of women from antiquity. To cite but two of a great many Bible verses denigrating women, “How then can man be justified with God? or how can he be clean that is born of a woman?” (Job 25:4) and “These [redeemed] are they which were not defiled with women.” (Revelation 14:4)

Today, some religions have acknowledged reality and accept the equality of men and women. Others have dug in their heels and still insist upon female subordination, though most are now wary of openly stating that women are inferior. And it’s safe to say that the more conservative the religion–that is, the more literally its members take their scriptures–the more likely they are to insist upon the inferiority and subjugation of women.

5. Finally, as Neil deGrasse Tyson famously remarked, science opens doors and religion closes them. Science not only leads to improvement in daily life, but to broader intellectual horizons; it encourages people to think for themselves, to question everything; it leads to one question after another.

Religion insists that all the answers are contained in ancient holy books, and that it’s wrong, dangerous to question those answers–that you have an intellect, but you shouldn’t use it.

Yep, it can be tedious. One on one, it’s not worth the aggravation, but when you have an audience it’s worth it for the sake of the audience. A good example of that is the recent Bill Nye / Ken Ham evolution debate. Hang in there — you’re performing a public service by debating Christian apologists on Godless Cranium.